Adidas had made a running spike in honor of Jim Ryun's world record run in Bakersfield, CA in 1967 - the 3:51.1 Spike Splash.
http://www.runningwarehouse.com/viewlargeshoe.html?pcode=ASPI2M3
It has every mile milestone printed on the shoe and looks pretty cool. Just stumbled upon it today and thought I'd post this.